Acoustic resonance

frequency variation strategy was able to reduce switching losses up to 20% over the conventional constant switching frequency SVPWM and DPWM2 techniques. This strategy also spreads peaky harmonic spectrum of the output waveform which may help in reducing acoustic noise, however, consequent introduction of lower frequency harmonics in the spectrum increase current THD which may heat up the motor and the magnet. Thus, in the future study, hardware validation will be done to test the impact of the…

This is analogous to an electrical system when electrical flow is opposed it causes a voltage applied to the system. In acoustics, the impedance is defined as the ratio of pressure to flow. 2.1.2 Micro Properties It is at the micro scale at which the material acts with the fluid. Micro properties are the geometry details that define the interaction between sound and the material…

Silence, after a hard day of school, all I wanted was to relax to the ballads of 50 cent, and I got silence. The bass must have shifted an exposed wire and shorted the amplifier, I fixed this a few times before that it almost became routine, but it was not a shorted wire. Troubleshoot, no solution, what could it be? My set up was almost perfect, lacking solely in achievable decibels. Second hand children science encyclopedias along with Questions and Answers books got me this far and for a…

1. Explain the difference between periodic and aperiodic waveforms. What are the visual differences? What are the characteristic sonic qualities of each? (2 points) Answer: A periodic waveform has repeatable patterns. Also, periodic waveforms have a tone. Most musical instruments have repeating periodic waveform. The periodic waveforms can also be found in bird sound and human vocal voice. However, an aperiodic waveform dose not have a repeating waveform and tone, like noise, the engine idling…

Assessment Gillam, S. L., & Ford, M. B. (2012). Dynamic assessment of phonological awareness for children with speech sound disorders. Child Language Teaching & Therapy, 28(3), 297-308. doi:10.1177/0265659012448087 Introduction: Gillam and Ford created a dynamic assessment to observe the associations concerning performance on a nonverbal phoneme deletion, word-level reading, and speech sound production that require verbal responses for school-age children with speech sound disorders. The…

The photo on the right shows a medical technician using an ultrasound machine to diagnose appendicitis to a patient, without the use of x-rays. The ultrasound imaging technique involves using high frequency sound waves and their echoes. The machine transmits high-frequency sound pulses into the patient’s body using a probe. In the image, the technician presses and moves the probe along the patient’s body. This photo was taken in the St. Louis Children’s Hospital, and obtained from *. In terms…

did u know that sound is energy and how sound work? Read more to find out how sound is energy and how sound work. Sound is a release of energy the energy is released in the form of vibrations . How sound work is the vibrations emit from whatever has made the sound in what is known as a longitudinal wave.A longitudinal wave is a wave that travels in a single direction. Next how can we hear sound. We can hear sound from a longitudinal wave for example when a tree falls and energy is released…

Client’s Name: Amanda Client’s Age: 49 Disorder: Dysphonia and Vocal Fold Nodules Observation #1 Amanda is a police officer, and her responsibilities include frequent speaking engagement in which she must speak a lot of ambient noise. In addition, she has smoked a pack of cigarettes a day for 25 years. Amanda was referred to a speech pathologist for evaluation of her voice. An examination revealed an abnormal change in the voice, or dysphonia, most likely bilateral true vocal nodule on the…

Instrument- .Glass bottle xylophone My experiment is about making a Glass bottle xylophone that plays six notes What is sound and how does it travel? Sound is a sort of energy made by vibrations (Jane. E, 2016). When any object vibrates, it causes movement in the air particles (Jane. E, 2016). These particles bump into the particles close to them, which makes them vibrate too causing them to bump into more air particles (Jane. E, 2016). This movement, called sound waves, keeps going until they…

Introduction The acoustic reflex (AR) describes the involuntary contraction of the stapedius tendon in response to high-intensity sound (Emanuel, 2009). An intricate neural network, receiving afferent input from the vestibulocochlear nerve and sending efferent output to the facial nerve, controls contraction (Emanuel, 2009). The reflex is intensity-dependent, as particular intensities cause the contraction. Once contracted, it lessens the vibrations traveling through the stapes footplate as it…